Hose clamp



Dec. 7, 1943. J o; YEmA 2,335,985

HOSE CLAMP Filed Aug. 1'7 `1942 Patented Dec. 7, 1943 UNlTED STTE.

s PATENT oFFicE HOSE CLAlWP .lohn 0. Yeida, Herculaneum, Mo., assignerto Automatic Control Corporation, St. Louis, Mo., a corporation ofDelaware Application August 17, 1942, Serial No. 455,134

(CLM- 19) i Claims.

This invention relates to hose clamps, and more particularly to thattype of hose clamp having a continuous metal band designed to wraparound the hose, the inner end being in sliding contact with the innersurface of the rest of the band.

, circle, the member projecting from the innermost portion of the bandbeing formed into a' right angle to lie adjacent to the face of theother member.

A third of these members is a continuation of the -circular band whichlies over the inner portion of the band and is designed upon tighteningto travel in the general direction of the rst oi these members.

An object of the invention is to provide a clamp that remainssubstantially circular throughout a range o clamping positions.Specifically, an object is to assist in accomplishing this by providingone of the tangential members relatively sti, and the other somewhatilexible.

.A further object is to provide means to maintain the overlapping endsof the clamp aligned.

.A further object of the invention is the provision of a clamp that willfasten` a hose section in position without buckling the same.

A further object of the invention is the provision of a clamp that canbe installed easily and quickly.

In the drawing:

Fig. 1 is a detailed end View of the clamp in position on a hose sectiontaken on the line i-i of Fig. 2;

Fig. 2 is a side view of the same;

Fig. '3 is a top view of the same; and

Fig. 4 is a sectional view illustrating the clamp in spread or distendedcondition. l

Referring to the drawing, there is a circular band Ill which is designedto engage the surface of a hose section with substantially equalpressure at all points; so as to maintain in itself and in the hosesection at all times a substantially circular shape.

The band l@ includes an inner end H from which a member I2 projectssubstantially` tangentially to the band Ill. This member has twoiian'ges I5 turned up along its edges, and the extremities of the`iianges are turned inwardly to lie at right angles to the strip I2,forming an end portion it. l

A exible strip I6 is attached to the band i0 at a point roughly 90 fromthe attachment of the member I2 to the band. It extends to lliealongside the end I4. The member I6 is given ilexibility to insure themaintenance of true circularity throughout the band Ill at all times,and

to avoid distortion of the end I4 relative to the strip l2.

The band I0 has a portion I8 overlapping the inner end Hand the stripl2. This portion it lies within the channel provided between the angesl5 and is maintained in alignment thereby. The portion I8 is turned upat I S to provide an ear opposite the portion it, and this may bereinforced by a block 20.

The upper and adjacent .ends of the portion l It and the strip I6arepierced by holes to receive a wing screw 22.. The ear i 9, and theblock 28 have a threaded opening toreceive the screw 22. it to receive alocking wire or the like, that may be wrapped around any convenientstationary part.

The operation of the device is as follows:

It may be assumed that the band It is passed over the end of a hosesection A and then the hose section A is iitted over a fitting B towhich it is to be secured. It may be desirable to coat the part of thehose section A beneath the band with some antifriction material suchassoap to assist in preventing the clamping device from binding into therubber or like-material of the hose section. However, the necessityotusing such antifriction material is minimized with the present clamp.v

If it is impractical to t the clamp into position as indicated above,the screw 22 may be" completely withdrawn, the ends II and it of thebandv l@ separated, the clamp passed completely around the hose, and thescrew 22 again passed through the opposed clamping ears. It is thennecessary only to draw the screw tight to cause a complete clamping andbinding.

In the operation of tightening the band, the inner projection Il of 'theband may be assumed as the starting point of a wrapping action. Thusassumption means that the portion It will be relatively fixed inposition, and the angular relationship of the portion I4 to the strip I2maintained by the flanges I5.

The screw 22 draws the ear I9 toward the portion It and in so doing, theear I9 and the end I8 of the band are held in alignment with the end I Iof the band by the anges I5.

It will be seen that the end I I tapers down to a.

The handle of the screw has ahole 23 in` rubber at that point during thetightening operation.

'I'he member I6 is exible so that the reduction in diameter o f thedevice may be substantially equal all around. However, the band I6maintains the strip I2 substantially tangential to the circle of theband so that the tightening force is exerted in such tangentialdirection, which is the direction of ideal wrapping and minimumdistortion. The flexibility of the band I6 does permit the main body ofthis band to deflect from relatively thin edge to reduce the piling up'of an angle of exactly 90 to the strip I2 and thereby permits even theportion ofthe band between the end II and the junction of the strip I6to conform to the screw of the hose. It also permits the portion of theband I6 that overlaps the portion I4 to remain contiguous theretothroughout the extent of the'portion I4. To illustrate the desirableuniformity of compression around the band of the present clamp, it maybe observed that if it is drawn down onto a free hose, it will collapsethe same in substantially circular condition.

It will be observed that the band I0 is of sufcient resiliency to followthe curvature of the hose and to bring the portion II against theoverlying part of the main band itself. The end II projects beyond thepoint of tangency of the outer portion I8 of the band so that thetighten-v ing forces of the wrapping action occasioned by thetangentially applied force will be distributed' rst arm, an upstandingear at the end of said arm, flanges extending from said ear to the pointof tangency. a third arm extending from a position adjacent to the lastmentioned ear to a position tangent to the circular portion of saidband, said arm being flexible, and a means for drawing said ears towardeach other.`

2. In a device of the kind described, a flexible band adapted to beformed into a circle with one end overlapping the other, a memberextending tangentially backward from the inner end beneath theoverlapping outer end, means to draw the overlapping outer end along thetangential member to reduce the size oi' the circle, and ilexible meansattaching the backward end of the tangential member to the band at apoint spaced from said inner end.-

3. In a device of the kind described, a flexible band adapted to beformed into a circle with an outer end overlapping an inner end, a stiffmember extending backward from a point spaced backwardly from the innerend of the band, and underlying the outer end of the band, a. flexiblemember connecting the stift member with the band to prevent outwarddisplacement of the end of the stift member relative to the center ofthe band, means connecting the stiil! member and the overlapping outerend of the band to draw the said outer end along the stiff member andreduce the size of the circle of the band.

4. In a device of the kind described, a flexible band adapted to beformed into a circle with an outer end overlapping an inner end, a.strip attached to the inner end and extending backwardly relativethereto, means attaching the outer end of the strip to the band, sidesextending upwardly from the strip to stiifen the same, and forming aguiding channel, the outer end of the band extending into the channeland movable therealong to vary the diameter of the band, and means todraw said outer end of the band toward the outer end of the strip.

JOHN o. YEIDA.

